Hello Chris, Let me tell you what I learned about what you commented on.

The "non-S" model-on the 2006, at least-has 5W-20 embossed on its oil filler cap.

The Amsoil site offered a choice between a K2071 or K20A3 engine.The 5W-30 was the recommended oil for the first engine listed, 5W-20 for the second.ERGO: Your friend has a K2071 engine.

SARCASM DEPT: Try to get the engine designations from the parts monkeys at a dealership (Park Ave. Acura in Maywood, NJ); what obstructive clowns.

REALITY DEPT: You'd think these jerks earned a cookie each time they snowed a customers. Do they really think the boss will ever take them to dinner?

QUESTION: Does anybody know where to learn about the basics of an '06 Acura RSX non-turbo? There's no Haynes manual for this vehicle. I need to know where the VVT control valve is located. It's likely clogged with dirt.